LOINC display name : Heparin induced platelet IgG IA [OD];
LOINC long common name : Heparin induced platelet IgG Ab in Serum or Plasma by Immunoassay;
LOINC short name : PF4 heparin cmplx IgG SerPl IA;
LOINC description : Heparin induced platelet (platelet factor 4, PF4) IgG antibodies are measured in optical
density as part of an immunoassay. A OD value of 0.4 is considered an initial positive
test. Additional heparin may be added to the patient's serum to determine percent
inhibition by heparin (see LOINC 73817-9) and confirm a positive result.;